Inositol hexaphosphate (IP6) is a chemical found in beans, brown rice, corn, sesame seeds, wheat bran, and other high-fiber foods. It is converted into compounds in the body that are used by cells to relay outside messages to the cell nucleus. IP6 also aids the body in its use, or metabolism, of calcium and other minerals.(cancer.org)

IP6 is a very specific form of inositol, and there are several other forms of it found in the human body. It is different, for instance, from myo-inositol, which is another form being studied because of its possible role in illnesses such as depression and anxiety.

Inositol hexaphosphate (IP6), or phytic acid is a natural dietary ingredient and has been described as a “natural cancer fighter”, being an essential component of nutritional diets. The marked anti-cancer effect of IP6has resulted in our quest for an understanding of its mechanism of action. In particular, our data provided strong evidence for the induction of apoptotic cell death. (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3876062/)

No studies have been reported in humans. Eating whole foods is the best options to avoid isolated nutrients that may not work synergistically. Do more research if you are interested on this subject.